I've always been under the impression that routing the exhaust
back into the boiler is not a wise thing to do. There is an
engine on German EBAY that does this, and it appears to be done
by one of the owners. What happens in this circumstance, besides
dropping the value?
www.ebay.de/itm/154512828772?hash=item23f9aea964:g:T7IAAOSwyGBgnPaXWayne
If the exhaust is indeed routed directly back into the top of the boiler, youŽd have a counterpressure equal or larger than the inlet at your exhaust.
One could just as well have a closed exhaust valve on there, and the engine wonŽt be able to run.
Gosh, I did not think of the counterpressure. I was just thinking
of the boiler water becoming fouled w/cylinder oil. I'd like to
see it steamed up - by someone else.
Wayne
(Clean) exhaust condensate can pumped back into the boiler via a pump of some sort. my Jensen #50 use to create about a pint per hr. during my shows. Jan is of course correct about his information.
So, if I was to make a standing tank for the exhaust the oil will
stay on top (lighter than water?) and the relatively clean water
could be pumped back into the boiler and reused. I presume the
feed pump would be crank driven and working all the time, like on
those old-timey German engines w/feed-pump I'm still waiting to score.
Ditto for a dynamo steam plant.
Then again, I've never run an engine long enough for a function
like this to serve a purpose other than proving it works.
Thanks for the replies,
Wayne
I have the machine on my list. But I probably won't buy it. Fortunately, it is not difficult to undo the tinkering. It's amazing what ideas some people come up with.
I think it's just the angle of the shot that is making it look like both lines are attached to the boiler. If you look at the 5th picture, in the upper right corner, it looks like the line from the side of the valve block ends just above the point where the other line is connected.
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Paula....
I do see what you make reference to in the 5th photo.
Either it was never run as is or it was cleaned very well.
I can see no evidence, on the boiler below the pipe in
question, that steamy, drippy exhaust ever ran down the
very hot boiler.
That said, it is a bit pricey.
Wayne
Hello Paula,
you are right. Obviously some people here, including me, need one or a new pair of glasses.
Oh yes, from photo 5, it has a bugle horn exhaust.
Nice engine but too pricy imho.
But then again there seems to be inflation in old European steam engines so maybe I'm too cheap?
So, if I was to make a standing tank for the exhaust the oil will
stay on top (lighter than water?) and the relatively clean water
could be pumped back into the boiler and reused. I presume the
feed pump would be crank driven and working all the time, like on
those old-timey German engines w/feed-pump I'm still waiting to score.
Ditto for a dynamo steam plant.
Then again, I've never run an engine long enough for a function
like this to serve a purpose other than proving it works.
Thanks for the replies,
Wayne
Hi Wayne, It doesn't always work this way with steam cylinder oil because it is designed to mix well with water and steam and thus will stay in suspension for a much longer time than regular motor or vegetable oil. It is great for the cylinder but not for the boiler.
I use drip pans and such and sometimes the oil water mix is like milk the next day when I clean it up.
I haven't checked how long it takes to separate but probably weeks?